Single-trigger double-barrel firearm



Sept. 18, 1951 J. A. MoRRoNE SINGLE-TRIGGER, DOUBLE-BARREL FIREARM 3 Sheets-Sheet l Filed March 8, 1949 Sept. 18, 1951 J. A. MoRRoNE SINGLE-TRIGGER, DOUBLE-BARREL FIREARM 3 Sheets-Sheet 2 5 NSD INVENTOR.

SW w mv A m im NW KW QJ u VWNM NNN Filed March 8, 1949 Sept. 18, 1951 .1. A. MORRONE SINGLE-TR1GGER, DOUBLE-BARREL FIREARM 5 Sheets-Sheet 5 Filed March 8, 1949 INVENTR. Mm

Patented Sept. 18, 1951 SINGLE-TRIGGER DOUBLE-BARREL FIREARM .l oseph A.-v Morrone, Westerly, R. I.

Application March 8, 1949, Serial No. 80,173

'l Claims; 1

This invention is directedV to certain improvements in rearms and more particularly to iirearms of the over and under type inwhich a single trigger of the non-selective type is. employedY to fire the barrels.

The object of my invention is to materially simplify the construction of a firearm of this type and to employ a novel combination of elements for positively controlling the firing of the barrels.

A further object is to provide a combination of elements which eliminates inertia means for automatically locking the firing mechanism.

A practical embodiment of my invention is represented in the accompanying drawings, in which Fig. 1 represents a detail side view of the nrearm, partly in section.

Fig. 2 represents a side view of the rearm broken,y part of the stock being broken away.

Fig. '3 represents a detail longitudinal vertical section taken in a longitudinal vertical plane between the hammers.

Fig. 4 represents an enlarged detail longitudinal vertical section showing the hammers in red position.

Fig. 5 represents an end view of the elements shown in Fig. 4.

Fig. 6' represents a detail bottom pl'an view of the top lever.

Fig. 7 represents a detail cross section of the spring tension for the top lever.

Fig. 8 represents a top plan View of the kick block;

Fig. 9 represents a detail side View of the trunnion block and barrels.

Fig. 10 represents a rear end View of the same.

Fig. 11 represents a top plan view of the firing mechanism.

Fig. 12 'represents' a detail side view of the trig'- ger'plate.

Fig. 13 represents a plan view of the short Sear for controlling the operation ofthe long hammer.

Fig. 14 represents'a side view of the same.

Fig. 15 represents a plan view ofthe long sear' for controlling the operation of the short ham'- mer.

Fig. 16 represents a side view of the same.

Fig. 17 represents an end view of the sear tripping rock lever.

Fig. 18 represents a side view of the same;

Fig. 19 represents a side view of the single trigger.

Fig. 20 represents an end view of the'same.

Fig. 21 represents a detail'cross section showing connection between the shank of top lever and breech locking pin.

Fig. 22'repre'sent's a side view of the framev in'- cluding the receiver, breech block and tang;

Fig. 23 represents a front end view of thesame.

Fig. 24 represents a rear end view ofthe same.

Fig. 25 represents a top plan View ofthe same.

The' lower and upper barrels ofv the rearni are denoted by I and 2-, the trunnionblocl in which the rear endsof the barrels aresecured`,by 3, its trunnions by and the fore-endby 5f T-herstock is denoted by l.` The frame which together with the trigger plate carries the firing mechanism, includes the breech block 1, the forwardly extended receiver 8 to-whichisrpivoted the trunnion block 3, and the rearwardly eX- tendedtop tang 9.l The removable trigger plate I0 is provided with uprising sides Hand also with an uprising rear end I2. This trigger plate may be removably secured at its forward end to the breech` block 'I of the frame by a screw I3 and the uprising. rear end I2 may be secured to the rear end of the tang 9- of the frame" by a screw I4.

A screw bolt I5 which extends forwardly through the stock 6Y into engagement with the uprisingv rear end I2 of the trigger platel serves to secure the frame and trigger plate within the recessedforward-endof the stock 6. The trunnion block 3- with its superposed barrels I andV 2 may be releasably locked to the breech block 'I of the frame when the rearm isclosedfby the usual laterally swingingr top lever I6, the vertical shank Il of which is rotatably mounted in the breech block 1. This shank. I'I is. provided with the cross pin I8 for operating the sliding.I lock pin I9 whose forward end isarranged to enterthe recess 2U in the rear face ofy theY tr-unnion block 3. This shank I1v is provided with. cross holes ZI and Z2 through whichVV theY lower and upper ring pins 23 and 24 pass.. Thetop lever I 6 is yieldingly held in itsV locking position.r by the use of aspring VbiasedV pin. 25 working in a ilat V-shaped recess inthe lever shank I1 (see Fig.. 7) These firing pins areY slidably mounted in the breech block 'l of. the. frame and they are located in the same. longitudinal. vertical plane. Springs 26 and 2T are provided'. for yieldingly holding the firing pins 23- and 2lii in. theirp retracted positions.

The firing pins 23 and 24 are shownwasangu.- larly. disposed, the lower firing pin. 2'3. being inclinedfrom its forward end rearwardly andup-y wardly, and upper ring pin 2'4 being inclined from its forward end rearwardly and downwardly. Pins 23 and 24 are located at different angles to the horizontal longitudinal axis of breech block 1 as shown in Fig. 4.

The short hammer 28 and the long hammer 29 for ring the lower and upper barrels and 2 respectively, are pivoted on a cross pin 36 xedly mounted in the uprising sides of the removable trigger plate IU. These hammers have overlapping firing pin striking surfaces on inwardly projected lower and upper lugs 3| and 32 which are located in the same longitudinal vertical plane as the firing pins 23 and 24 and at different distances from the pivot pin 30. A spacer 33 is interposed between the hammers on the pivot pin 3|). g

'I'he usual main springs 34 andr35 operate to bias the hammers 28 and 29 in a forward direction for striking their respective firing pins 23 and 24 when the hammers are successively released by their respective long and short sears 36 and 31. These hammer biasing springs 34 and 35 are shown as of the usual hair pin'type with the rear endsY of the springs engaging the trigger plate and the front ends of the springs seated in the recesses 38 and 39 of their respective hammers 28 and 29.

'Ihesesears 36 and 31 are pivoted on a cross pin 40 fixedly mounted in the said uprising sides of the trigger plate I6. The long Sear 36 for releasably locking the short hammer 28 for ring the lower barrel I, when the hammer is in itscocked position, has its forward arm arranged to releasably engage an abutment 4| on the hub of the said hammer 28. The short sear 31 for releasably locking the long hammer 29 for ring the upperbarrel 2, when the hammery is in its cocked position, has its forward arm arranged to releasably engage an abutment 42 on'the hub of the said hammer 29.

The long and short sears 36 and 31 are biased to normally depress their rear arms, by coil springs 43 and 44 located between the trigger plate I0 and the front arms of said sears.

The single trigger 45 is pivoted on the cross pin 40 which serves also as a pivotk for the long and short sears 36 and 31. This trigger 45 is biased forwardly by a coil spring 46 located between the trigger plate I0 and the front arm of the trigger. A sear tripper is carried by thertrigger 45, which tripper is shown as comprising a rock lever 41 pivoted at 48to the top of the said trigger, a coil spring 49 being located between the trigger and the rear arm of the rock lever 41 serving to bias the lever to depress its front arm.

'I'his sear tripping rock lever 41 is positively connected to the long sear 36 as, for instance, by providing an inverted L-shaped slotl 56 in the rear arm of the rock lever 41 and a laterally projecting pin 5| on the rear arm of the long sear 36, which extends into said slot 50, the length of said slot not being critical.

The front arm of the rock lever 41 is preferably beveled in one direction and the rear arm of the short sear 31 is provided with a lateral extension 52, the edge of which is beveled in the opposite direction for facilitating the coaction of the rock lever and short sear 31 as will be hereinafter explained.

The means for locking the trigger 45 is shown as comprising the following elements. The trigger is provided with an uprisingrear end 53 arrangedrin position to beengaged bythe depend, ing arm 54 ofa slidable safety lock 55v when the,

4 lock is slid rearwardly along the tang 9 of the frame.

The fore-end 5 may be removably secured in position, as, for instance, by providing the foreend iron 56 with a spring pressed plunger 51 arranged in position to engage a recessed stud 58l depending from a clip 59, said stud projecting into the recess 60 in the said fore-end iron.

The breaking of the irearm may be assisted by the following means. A kick block 6| is provided with a nose 62 located under the rear end of the trunnion block 3. This kick block is pressed upward by a spring 63 and it is provided with a tongue 64 which is adapted to enter a groove 65 in the bottom of the shank |1 when the lock lever I6 is swung into position to release the trunnion block 3 by withdrawing the locking pin |9. 'Ihe spring 63 will tend to push the kick block upwardly and thus exert an upward pressure on the trunnion block 3.

The hammer cooking meanswhich operates as the rearm is broken, is shown as comprising the following elements. Two cocking pins 66 and 61 are slidable in the frame through the receiver and breech block with the front ends of the cocking pins engaged by two concavey cam surfaces 68 and 69 in the rear end of the fore-end iron 56, the rear ends of these cooking pins engaging the oifset cams 10 and 1| on the hammers 28 and 29.

The shell extractor mechanism is shown as in'-v cluding the following elements. The shank 12 of the extractor 13 is slidable in the undercut groove 14 extending along one side of the trunnion block 3 and this shank is provided with an abutment 15 which is located in position to be engaged by the fore-end iron 56 to move the 'ex-'g tractor rearwardly as the rearm is broken. The closing of the rearm will cause the extractor to be returned to its normal position.

The operation of the firing mechanism is as follows. The trigger 45 is first unlocked by the sliding forward of the safety lock 55. The trigger 45 is then pulled back against the compression of its spring 46. This rocking movement of the trigger will raise the rock lever 41 pivoted to the top of the trigger and carried thereby and, con'- sequently, impart this upward motion to the rear end of long sear 36 due to the riding engagement of its laterally projecting pin 5| with the forward bottom section of L-shaped slot 56 in rock lever 41. Long sear 36 is thus rocked on its pivot pin 40 thereby depressing its front end until the same is released from its locking engagement with abutment 4| on the hub of short hammer 28. Ham

mer 28 will then be rocked forwardly by its main spring 34 to cause lug 3| to strike lower rring pin 33 and fire the lower barrel l To re the upper barrel 2, the pull on the trigger 45, which has just fired lower barrel as.

above described, must be released and the trigger returned to its forward position. This return is accomplished by the pressure of springv 46 against the under side of trigger 45 causing the latter to swing forwardly downward on crosspin 49. As the trigger so swings forwardly and downwardly its rear end is lowered carrying with it the rock level 41 swung thereon at 48. As the pressure on trigger 45 is further released this.`

rear end of long sear 36 stays 4its rased'position since its forward endl is held beneaththe hammer 28 after the latter hasbeen lllfgedlfor- Ward by its spring 34. The tilting downwardly of the front arm of lever 41 due to the' actionof spring 49, slightly precedes the completion of the forward carry oflever 41- inducedfaby the swing of trigger 45 carryingthelever pivot 48, said trigger being urged4 byl spring 4B; as --above set forth. At the end of-saidforwardcarry'the front arm of lever 4-'1 Vrests beneath the're'ararm of short sear 31. K

Trigger 45 may now be pulled again which will discharge upper barrel 2,-involving mechanism functioning as follows: The trigger as it is pulled swings about pin 4B in an arc rearwardly and upwardly. Due to the shape of slot 50 in rock lever 41 permitting pin 5| to ride free therein, the front arm of said lever 41 will engage the under side of the tail of sear 31 before the rock lever starts to rock rearwardly on pivot 48. This rocking is influenced by several factors as the trigger pull continues including the pin 5| which is fixed in its highest position contacting the upper side of slot 50 due to the arc described by lever 41 when lifted by the trigger 45 pulled as above set forth. and partially by the weight of lever 41 in its unbalanced relation to pivot 48, which position tends to compress spring 49. Front arm of lever 41 is positioned under the tail of sear 31, while pivot 48 is being raised, pin 5I being Xed against downward motion as above described. The continued lift of lever 41 by the continuing pressure on trigger 45 carries the rock lever front arm, which is in contact with or beneath sear rear arm 31, upwardly and lifts the latter, rocks lever 48 to the rear thereby raising the tail of sear 31 to a point where its depressed arm is released from its locking engagement with the abutment 42 on the hub of long hammer 29. This hammer 29 will then be urged forward by its main spring 35 to cause its lug 32 to strike the upper firing pin 24 and thereby fire said upper barrel 2.

It is evident that various changes may be resorted to in the construction, form and arrangement of the several parts without departing from the spirit and scope of my invention, and hence I do not intend to be limited to the particular embodiment herein shown and described.

What I claim is:

l. In a firearm, a frame, two spring biased hammers, means for cooking them, two spring biased rocking sears for releasably holding the hammers cocked, a trigger, a spring biased rock lever thereon, and a pin and slotl connection between the lever and one sear to trip it to release one hammer when the trigger is pulled, said lever being moved into position to trip the other sear when the trigger is returned to its normal position and to release the other hammer when the trigger is again pulled.

2. In a firearm, a frame, two spring biased hammers, means for cooking them, two spring biased rocking sears for releasably holding the hammers cocked, a trigger and a spring biased rock lever thereon, the lever having a slot and one of the sears having a pin projecting into the slot whereby the sear is tripped to release the hammer when the trigger is pulled, said lever being moved into position to trip the other sear when the trigger is returned to its normal position and to release the other hammer when the trigger is again pulled.

3. In a firearm, a frame, two spring biased hammers, means for cooking them, two spring biased rocking sears for releasably holding the hammers cocked, a trigger, and a springlbiased rock lever thereon having an invertedY L-shaped slot and one of the sears having a pin projecting into the slot whereby the sear is tripped to release the hammer when the trigger is pulled, said lever being moved into position to trip the other searvwhen the trigger is. returned to its normal position and to release the other hammer when the trigger is again pulled.

4. In an over and under firearm, a frame, two spring retracted firing pins located in the same longitudinal vertical plane, twoY spring biased l,rocking hammers Vprovided with pin stirkingv sur- -`faces located in the sameV longitudinal vertical plane as the ring pins and at different distances from the axis of rotation of the hammers, means for cooking the hammers, two spring biased rocking sears for releasably holding the hammers cocked, a trigger and a spring biased rock lever thereon positively connected to one sear to trip it for releasing one hammer when the trigger is pulled, said lever being moved into position to trip the other sear when the trigger is returned to its normal position and to release the other hammer when the trigger is again pulled.

5. In an over and under firearm, a frame, two spring retracted firing pins located therein in the same longitudinal vertical plane, the upper firing pin inclined rearwardly and downwardly and the lower firing pin inclined rearwardly and upwardly, two spring biased rocking hammers provided with pin striking surfaces located in the same longitudinal vertical plane as the firing pins and at different distances from the axis of rotation of the hammers, means for cooking the hammers, two spring biased rocking sears for releasably holding the hammers cocked, a trigger and a spring biased rock lever thereon positively connected to one sear to trip it for releasing one hammer when the trigger is pulled, said rock lever being moved into position to trip the other sear when the trigger is returned to its normal position and to release the other hammer when the trigger is again pulled.

6. In an over and under firearm, a frame, a trigger plate removably secured thereto, two spring retracted slidable firing pins located in the frame in the same longitudinal vertical plane, two spring biased hammers pivoted to the trigger plate and provided with pin striking surfaces located in the same longitudinal vertical plane as the firing pins and at different distances from the axis of rotation of the hammers, means for cooking the hammers, two spring biased rocking sears pivoted on the trigger plate for releasably holding the hammers cocked, a trigger pivoted on the trigger plate and a spring biased rock lever on the trigger positively connected to one sear to release one hammer when the trigger is pulled, said lever being moved into position to trip the other sear when the trigger is returned to its normal position and to release the other hammer when the trigger is again pulled.

'7. In an over and under firearm, a frame, a trigger plate removably secured thereto, two spring retracted ring pins slidable in the frame and arranged in the same longitudinal vertical plane, two spring biased hammers pivoted to the trigger plate and having inwardly directed offset pin striking lugs arranged in the same longitudinal Vertical plane as the firing pins, means for cooking the hammers, a spring biased trigger pivoted on the trigger plate, longer and shorter sears pivoted on the trigger plate for releasably holding the hammers cocked, and a Sear tripping lever pivoted on the trigger and positively connected to the longer sear and movable into operative connection with the shorter Sear.

Y JOSEPH A. MORRONE.

REFERENCES CITED .Y

The following references are of record in the 4leof this patent:

UNITED STATES PATENTSv Number Name Date 1,018,759 Hamersly Feb. 27, 1912 1,109,632l Kautzky Sept. 1, 1914 Y 1,302,909 Giddings May 6, 1919 Number Number vGreat Britain 1 1 189 

